PTGER1 and neoplasm: PTGER1 demonstrated non-significant downregulation with a Log2FC of -0.91678 and adjusted P-value of 0.352289. In LIHC, analysis of the GSE115018 dataset, which included 12 tumor samples and 12 para-cancerous normal tissue specimens collected 2 cm from the tumor margin, identified 26,684 DEGs.